As quoted in Eruvin 14a, from Kings I 7:23, we know that Shlomo's pool was round, measuring 10 across and 30 around. There have been discussions about how the ratio of these (3:1) is only an approximation to pi, or that it deals only with significant figures.
Are there any sources that deal with the possibility that the pool was not circular, but rather an ellipse? A major axis of 5 and minor axis of 4.543 would give a circumference of 30. Are these any other places where sources discuss elliptical shapes as ways of resolving a seeming contradiction?
Of course, this is separate from the discussion in the daf regarding the shape of the 3D pool. The calculation of volume would have to change to accommodate the difference in area of the top (ellipse would have an area even smaller than the circle).